The fact is we’ll never probably know their motives unless we open their archives.
It is called the Koran, and the motive is to kill every infidel on earth to please their God to buy a ticket to Paradise. The only general mistake I see is thinking that there is any difference between HAMAS, Hizbollah, Saudi Arabia or Iran. They are all just warlords in the Empire of Islam.
One day they will go too far and some modern western nation will remove all their capitol cities. Until then, we play politics with Billions of dollars of arms sales make fat cats fatter, and cause us to have to pay them for passports.